The corn root aphid and methods of controlling it.
By: [Rev. May 1949 by C.M. Packard.
Contributors: Packard, C. M.
Series: Farmers' bulletin,; no. 891; Farmers' bulletin (United States. Dept. of Agriculture); no. 891.
Publisher: U. S. Govt. Print. Off.
Published: 1949
Place of publication: Washington
Language: eng
Subjects: Corn root-aphis.
Notes: Contribution from Bureau of Entomology and Plant Quarantine.